Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.


Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.

Remove ads
Don't know
Know
remaining cards
Save
0:01
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
Retries:
restart all cards




share
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Ecology

Describe the field of ecology

QuestionAnswer
Ecosystems complex, interactive systems that include both biological communities (biotic) and physical (abiotic) components of the environment.
Organisms and populations organisms are dependent on their environmental interactions both with living and nonliving factors.
Hierarchy a hierarchical structure exists, Organism Groups of the same organisms (species) form populations, Different populations interact to form communities, Communities live within an ecosystem, and all of the ecosystems on Earth make up the biosphere.
Energy individual organisms, ecosystems are sustained by the continuous flow of energy.
Changing ecosystems Ecosystems are dynamic in nature; their characteristics can vary over time and disrupt to any physical or biological component of an ecosystem can lead to shifts in all its populations.
Biodiversity describes the variety of species found in Earth’s terrestrial and oceanic ecosystems. The completeness or integrity of an ecosystem’s biodiversity is often used as a measure of its health.
Populations a group of organisms belonging to the same species that live in a particular area. Populations can be described based on their size, density, or distribution.
Population Density Population density measures the number of individual organisms living in a defined space.
Regulating Population Size a population is affected by limiting factors that include density-dependent, density-independent, abiotic and biotic factors.
Density-dependent factors Limiting factors that are density-dependent are those that operate more strongly on large populations than on small ones.
Density-independent factors Limiting factors that are density-independent are those that occur regardless of how large the population is and reduce the size of all populations in the area in which they occur by the same proportion.
Abiotic factors are nonliving things in an ecosystem and may be chemical or physical. Some examples are water, nitrogen, oxygen, salinity, pH, soil nutrients and composition, temperature, amount of sunlight, and precipitation.
Biotic factors all of the living components of an ecosystem. Some examples are bacteria, fungi, plants, and animals.
Changes in abiotic and biotic factors A change in an abiotic or biotic factor may decrease the size of a population if it cannot acclimate or adapt to or migrate from the change.
Created by: matthewm2022